Tulln Town Hall Relies on Sustainable Heating from Wastewater
Historic Building Meets Future-Proof Energy Technology: Tulln Town Hall has been equipped with a modern wastewater heat pump solution. The iDM TERRA SW 90 MAX H uses renewable energy from the city’s wastewater system to efficiently provide heating and cooling for radiators and underfloor heating. Thanks to intelligent system cooling, a compact plant room, and a sustainable overall concept, the project delivers a comfortable and energy-efficient solution for demanding existing buildings.
For the heating supply of Tulln Town Hall, an innovative wastewater heat pump system was implemented. The energy source is the city of Tulln’s wastewater, which is harnessed via a high-performance wastewater heat exchanger. This allows previously unused energy to be utilized efficiently and converted into sustainable heating and cooling energy.
The system features a powerful iDM TERRA SW 90 MAX H high-temperature heat pump with 100 kW heating capacity and 45 kW cooling capacity. The installation reliably and comfortably supplies both the existing radiators and the newly integrated underfloor heating system. Especially in existing and historic buildings, high flow temperatures are essential – making the TERRA SW MAX H the ideal solution.
Particular attention in this project was given to the compact design of the plant room and the careful integration of the system technology into the existing building structure. The system is complemented by a 4,000-liter heating buffer tank and a 4,000-liter cooling buffer tank, ensuring highly efficient and stable operation.
Another highlight is the integrated iDM system cooling, which enables the cooling function of the high-temperature heat pump without reversing the refrigeration cycle. This allows the historic building to be comfortably cooled during summer while maintaining particularly energy-efficient operation.
The project impressively demonstrates how historic existing buildings can be sustainably modernized using innovative heat pump technology. In addition, the goal is to gradually reduce the flow temperatures within the building in order to further increase the overall system efficiency in the long term.
